*{
    padding: 0;
    margin: 0;
    list-style: none;
    box-sizing: border-box;
    text-decoration: none;
}
.box{
    width: 300px;
    height: 300px;
    border: 1px solid #ccc;
    margin: 30px auto 0;
}
.title{
    display: flex;
    border-bottom: 1px solid #ccc;
}
.title span{
    flex: 1;
    text-align: center;
    line-height: 40px;
}
.active{
    background-color: orange;
}
.con>div{
    text-align: center;
    line-height: 100px;
    font-size: 20px;
    color: red;
    display: none;
}
.show{
    display: block!important;
}